package com.ocom.common.utils;

import org.apache.commons.codec.binary.Base64;
import org.bouncycastle.asn1.*;
import org.bouncycastle.asn1.gm.GMNamedCurves;
import org.bouncycastle.asn1.x500.X500Name;
import org.bouncycastle.asn1.x500.X500NameBuilder;
import org.bouncycastle.asn1.x500.style.BCStyle;
import org.bouncycastle.asn1.x9.X9ECParameters;
import org.bouncycastle.crypto.InvalidCipherTextException;
import org.bouncycastle.crypto.digests.SM3Digest;
import org.bouncycastle.crypto.engines.SM2Engine;
import org.bouncycastle.crypto.params.ECDomainParameters;
import org.bouncycastle.crypto.params.ECPrivateKeyParameters;
import org.bouncycastle.crypto.params.ECPublicKeyParameters;
import org.bouncycastle.crypto.params.ParametersWithRandom;
import org.bouncycastle.jcajce.provider.asymmetric.ec.BCECPrivateKey;
import org.bouncycastle.jcajce.provider.asymmetric.ec.BCECPublicKey;
import org.bouncycastle.jcajce.spec.SM2ParameterSpec;
import org.bouncycastle.jce.provider.BouncyCastleProvider;
import org.bouncycastle.jce.spec.ECParameterSpec;
import org.bouncycastle.jce.spec.ECPrivateKeySpec;
import org.bouncycastle.jce.spec.ECPublicKeySpec;
import org.bouncycastle.math.ec.ECPoint;
import org.bouncycastle.operator.ContentSigner;
import org.bouncycastle.operator.jcajce.JcaContentSignerBuilder;
import org.bouncycastle.pkcs.PKCS10CertificationRequest;
import org.bouncycastle.pkcs.jcajce.JcaPKCS10CertificationRequestBuilder;
import org.bouncycastle.util.encoders.Hex;

import javax.crypto.Cipher;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;
import java.io.*;
import java.math.BigInteger;
import java.security.*;
import java.security.cert.CertificateFactory;
import java.security.cert.X509Certificate;
import java.util.Arrays;

/**
 * need jars:
 * bcpkix-jdk15on-160.jar
 * bcprov-jdk15on-160.jar
 *
 * ref:
 * https://tools.ietf.org/html/draft-shen-sm2-ecdsa-02
 * http://gmssl.org/docs/oid.html
 * http://www.jonllen.com/jonllen/work/164.aspx
 *
 * 用BC的注意点：
 * 这个版本的BC对SM3withSM2的结果为asn1格式的r和s，如果需要直接拼接的r||s需要自己转换。下面rsAsn1ToPlainByteArray、rsPlainByteArrayToAsn1就在干这事。
 * 1.60、1.61版本的BC对SM2的结果为C1||C2||C3，据说为旧标准，新标准为C1||C3||C2，用新标准的需要自己转换。下面（被注释掉的）changeC1C2C3ToC1C3C2、changeC1C3C2ToC1C2C3就在干这事。1.62版本开始加上了C1C3C2，初始化时“ SM2Engine sm2Engine = new SM2Engine(SM2Engine.Mode.C1C3C2);”即可。
 *
 * 按要求国密算法仅允许使用加密机，本demo国密算法仅供学习使用，请不要用于生产用途。
 */
public class GmUtil {

	private static X9ECParameters x9ECParameters = GMNamedCurves.getByName("sm2p256v1");
	private static ECDomainParameters ecDomainParameters = new ECDomainParameters(x9ECParameters.getCurve(), x9ECParameters.getG(), x9ECParameters.getN());
	private static ECParameterSpec ecParameterSpec = new ECParameterSpec(x9ECParameters.getCurve(), x9ECParameters.getG(), x9ECParameters.getN());

	static {
		if (Security.getProvider("BC") == null) {
			Security.addProvider(new BouncyCastleProvider());
		} else {
			Security.removeProvider("BC"); //解决eclipse调试时tomcat自动重新加载时，BC存在不明原因异常的问题。
			Security.addProvider(new BouncyCastleProvider());
		}
	}

	/**
	 *
	 * @param msg
	 * @param userId
	 * @param privateKey
	 * @return r||s，直接拼接byte数组的rs
	 */
	public static byte[] signSm3WithSm2(byte[] msg, byte[] userId, PrivateKey privateKey){
		return rsAsn1ToPlainByteArray(signSm3WithSm2Asn1Rs(msg, userId, privateKey));
	}

	/**
	 *
	 * @param msg
	 * @param userId
	 * @param privateKey
	 * @return rs in <b>asn1 format</b>
	 */
	public static byte[] signSm3WithSm2Asn1Rs(byte[] msg, byte[] userId, PrivateKey privateKey){
		try {
			SM2ParameterSpec parameterSpec = new SM2ParameterSpec(userId);
			Signature signer = Signature.getInstance("SM3withSM2", "BC");
			signer.setParameter(parameterSpec);
			signer.initSign(privateKey, new SecureRandom());
			signer.update(msg, 0, msg.length);
			byte[] sig = signer.sign();
			return sig;
		} catch (Exception e) {
			throw new RuntimeException(e);
		}
	}

	/**
	 *
	 * @param msg
	 * @param userId
	 * @param rs r||s，直接拼接byte数组的rs
	 * @param publicKey
	 * @return
	 */
	public static boolean verifySm3WithSm2(byte[] msg, byte[] userId, byte[] rs, PublicKey publicKey){
		if(rs == null || msg == null || userId == null) return false;
		if(rs.length != RS_LEN * 2) return false;
		return verifySm3WithSm2Asn1Rs(msg, userId, rsPlainByteArrayToAsn1(rs), publicKey);
	}

	/**
	 *
	 * @param msg
	 * @param userId
	 * @param rs in <b>asn1 format</b>
	 * @param publicKey
	 * @return
	 */
	public static boolean verifySm3WithSm2Asn1Rs(byte[] msg, byte[] userId, byte[] rs, PublicKey publicKey){
		try {
			SM2ParameterSpec parameterSpec = new SM2ParameterSpec(userId);
			Signature verifier = Signature.getInstance("SM3withSM2", "BC");
			verifier.setParameter(parameterSpec);
			verifier.initVerify(publicKey);
			verifier.update(msg, 0, msg.length);
			return verifier.verify(rs);
		} catch (Exception e) {
//            throw new RuntimeException(e);
			return false;
		}
	}

	/**
	 * bc加解密使用旧标c1||c2||c3，此方法在加密后调用，将结果转化为c1||c3||c2
	 * @param c1c2c3
	 * @return
	 */
	private static byte[] changeC1C2C3ToC1C3C2(byte[] c1c2c3) {
		final int c1Len = (x9ECParameters.getCurve().getFieldSize() + 7) / 8 * 2 + 1; //sm2p256v1的这个固定65。可看GMNamedCurves、ECCurve代码。
		final int c3Len = 32; //new SM3Digest().getDigestSize();
		byte[] result = new byte[c1c2c3.length];
		System.arraycopy(c1c2c3, 0, result, 0, c1Len); //c1
		System.arraycopy(c1c2c3, c1c2c3.length - c3Len, result, c1Len, c3Len); //c3
		System.arraycopy(c1c2c3, c1Len, result, c1Len + c3Len, c1c2c3.length - c1Len - c3Len); //c2
		return result;
	}


	/**
	 * bc加解密使用旧标c1||c3||c2，此方法在解密前调用，将密文转化为c1||c2||c3再去解密
	 * @param c1c3c2
	 * @return
	 */
	private static byte[] changeC1C3C2ToC1C2C3(byte[] c1c3c2) {
		final int c1Len = (x9ECParameters.getCurve().getFieldSize() + 7) / 8 * 2 + 1; //sm2p256v1的这个固定65。可看GMNamedCurves、ECCurve代码。
		final int c3Len = 32; //new SM3Digest().getDigestSize();
		byte[] result = new byte[c1c3c2.length];
		System.arraycopy(c1c3c2, 0, result, 0, c1Len); //c1: 0->65
		System.arraycopy(c1c3c2, c1Len + c3Len, result, c1Len, c1c3c2.length - c1Len - c3Len); //c2
		System.arraycopy(c1c3c2, c1Len, result, c1c3c2.length - c3Len, c3Len); //c3
		return result;
	}

	/**
	 * c1||c3||c2
	 * @param data
	 * @param key
	 * @return
	 */
	public static byte[] sm2Decrypt(byte[] data, PrivateKey key){
		try {
			return sm2DecryptOld(changeC1C3C2ToC1C2C3(data), key);
		} catch (Exception e) {
//          throw new RuntimeException(e);
			return null;
		}
	}

	/**
	 * c1||c3||c2
	 * @param data
	 * @param key
	 * @return
	 */

	public static byte[] sm2Encrypt(byte[] data, PublicKey key){
		return changeC1C2C3ToC1C3C2(sm2EncryptOld(data, key));
	}

	/**
	 * c1||c2||c3
	 * @param data
	 * @param key
	 * @return
	 */
	public static byte[] sm2EncryptOld(byte[] data, PublicKey key){
		BCECPublicKey localECPublicKey = (BCECPublicKey) key;
		ECPublicKeyParameters ecPublicKeyParameters = new ECPublicKeyParameters(localECPublicKey.getQ(), ecDomainParameters);
		SM2Engine sm2Engine = new SM2Engine();
		sm2Engine.init(true, new ParametersWithRandom(ecPublicKeyParameters, new SecureRandom()));
		try {
			return sm2Engine.processBlock(data, 0, data.length);
		} catch (InvalidCipherTextException e) {
			throw new RuntimeException(e);
		}
	}

	/**
	 * c1||c2||c3
	 * @param data
	 * @param key
	 * @return
	 */
	public static byte[] sm2DecryptOld(byte[] data, PrivateKey key){
		BCECPrivateKey localECPrivateKey = (BCECPrivateKey) key;
		ECPrivateKeyParameters ecPrivateKeyParameters = new ECPrivateKeyParameters(localECPrivateKey.getD(), ecDomainParameters);
		SM2Engine sm2Engine = new SM2Engine();
		sm2Engine.init(false, ecPrivateKeyParameters);
		try {
			return sm2Engine.processBlock(data, 0, data.length);
		} catch (Exception e) {
//            throw new RuntimeException(e);
			return null;
		}
	}

	public static byte[] sm4EncryptECB(byte[] keyBytes, byte[] plain, String algo){
		if(keyBytes.length != 16) throw new RuntimeException("err key length");
		if(algo.toLowerCase().endsWith("noppading") && plain.length % 16 != 0) throw new RuntimeException("err data length");

		try {
			Key key = new SecretKeySpec(keyBytes, "SM4");
			Cipher out = Cipher.getInstance(algo, "BC");
			out.init(Cipher.ENCRYPT_MODE, key);
			return out.doFinal(plain);
		} catch (Exception e) {
			throw new RuntimeException(e);
		}
	}

//    public static byte[] sm4Decrypt(byte[] keyBytes, byte[] cipher){
//    	return sm4Decrypt(keyBytes, cipher, NO_PADDING);
//    }

	public static byte[] sm4DecryptECB(byte[] keyBytes, byte[] cipher, String algo){
		if(keyBytes.length != 16) throw new RuntimeException("err key length");
		if(algo.toLowerCase().endsWith("noppading") && cipher.length % 16 != 0) throw new RuntimeException("err data length");

		try {
			Key key = new SecretKeySpec(keyBytes, "SM4");
			Cipher in = Cipher.getInstance(algo, "BC");
			in.init(Cipher.DECRYPT_MODE, key);
			return in.doFinal(cipher);

		} catch (Exception e) {
//            throw new RuntimeException(e);
			return null;
		}

	}

	/**
	 * @param bytes
	 * @return
	 */
	public static byte[] sm3(byte[] bytes) {
		SM3Digest sm3 = new SM3Digest();
		sm3.update(bytes, 0, bytes.length);
		byte[] result = new byte[sm3.getDigestSize()];
		sm3.doFinal(result, 0);
		return result;
	}

	private final static int RS_LEN = 32;

	private static byte[] bigIntToFixexLengthBytes(BigInteger rOrS){
		// for sm2p256v1, n is 00fffffffeffffffffffffffffffffffff7203df6b21c6052b53bbf40939d54123,
		// r and s are the result of mod n, so they should be less than n and have length<=32
		byte[] rs = rOrS.toByteArray();
		if(rs.length == RS_LEN) return rs;
		else if(rs.length == RS_LEN + 1 && rs[0] == 0) return Arrays.copyOfRange(rs, 1, RS_LEN + 1);
		else if(rs.length < RS_LEN) {
			byte[] result = new byte[RS_LEN];
			Arrays.fill(result, (byte)0);
			System.arraycopy(rs, 0, result, RS_LEN - rs.length, rs.length);
			return result;
		} else {
			throw new RuntimeException("err rs: " + Hex.toHexString(rs));
		}
	}

	/**
	 * BC的SM3withSM2签名得到的结果的rs是asn1格式的，这个方法转化成直接拼接r||s
	 * @param rsDer rs in asn1 format
	 * @return sign result in plain byte array
	 */
	public static byte[] rsAsn1ToPlainByteArray(byte[] rsDer){
		ASN1Sequence seq = ASN1Sequence.getInstance(rsDer);
		byte[] r = bigIntToFixexLengthBytes(ASN1Integer.getInstance(seq.getObjectAt(0)).getValue());
		byte[] s = bigIntToFixexLengthBytes(ASN1Integer.getInstance(seq.getObjectAt(1)).getValue());
		byte[] result = new byte[RS_LEN * 2];
		System.arraycopy(r, 0, result, 0, r.length);
		System.arraycopy(s, 0, result, RS_LEN, s.length);
		return result;
	}

	/**
	 * BC的SM3withSM2验签需要的rs是asn1格式的，这个方法将直接拼接r||s的字节数组转化成asn1格式
	 * @param sign in plain byte array
	 * @return rs result in asn1 format
	 */
	private static byte[] rsPlainByteArrayToAsn1(byte[] sign){
		if(sign.length != RS_LEN * 2) throw new RuntimeException("err rs. ");
		BigInteger r = new BigInteger(1, Arrays.copyOfRange(sign, 0, RS_LEN));
		BigInteger s = new BigInteger(1, Arrays.copyOfRange(sign, RS_LEN, RS_LEN * 2));
		ASN1EncodableVector v = new ASN1EncodableVector();
		v.add(new ASN1Integer(r));
		v.add(new ASN1Integer(s));
		try {
			return new DERSequence(v).getEncoded("DER");
		} catch (IOException e) {
			throw new RuntimeException(e);
		}
	}

	public static KeyPair generateKeyPair(){
		try {
			KeyPairGenerator kpGen = KeyPairGenerator.getInstance("EC", "BC");
			kpGen.initialize(ecParameterSpec, new SecureRandom());
			KeyPair kp = kpGen.generateKeyPair();
			return kp;
		} catch (Exception e) {
			throw new RuntimeException(e);
		}
	}

	public static BCECPrivateKey getPrivatekeyFromD(BigInteger d){
		ECPrivateKeySpec ecPrivateKeySpec = new ECPrivateKeySpec(d, ecParameterSpec);
		return new BCECPrivateKey("EC", ecPrivateKeySpec, BouncyCastleProvider.CONFIGURATION);
	}

	public static BCECPublicKey getPublickeyFromXY(BigInteger x, BigInteger y){
		ECPublicKeySpec ecPublicKeySpec = new ECPublicKeySpec(x9ECParameters.getCurve().createPoint(x, y), ecParameterSpec);
		return new BCECPublicKey("EC", ecPublicKeySpec, BouncyCastleProvider.CONFIGURATION);
	}

	public static BCECPublicKey getPublickeyFromPrivatekey(BCECPrivateKey privateKey){
		ECPoint p = x9ECParameters.getG().multiply(privateKey.getD()).normalize();
		return getPublickeyFromXY(p.getXCoord().toBigInteger(), p.getYCoord().toBigInteger());
	}

	//不造为毛服务平台下载的没有头和尾，只有中间段的base64数据，加个方法方便直接读这串数据。
	public static PublicKey getPublickeyFromX509File(InputStream in){
		try {
			CertificateFactory cf = CertificateFactory.getInstance("X.509", "BC");
			X509Certificate x509 = (X509Certificate) cf.generateCertificate(in);
			return x509.getPublicKey();
		} catch (Exception e) {
			throw new RuntimeException(e);
		}
	}

	public static PublicKey getPublickeyFromX509File(File file){
		try {
			return getPublickeyFromX509File(new FileInputStream(file));
		} catch (FileNotFoundException e) {
			throw new RuntimeException(e);
		}
	}

	public static class Sm2Cert {
		private PrivateKey privateKey;
		private PublicKey publicKey;
		private String certId;
		public PrivateKey getPrivateKey() {
			return privateKey;
		}
		public void setPrivateKey(PrivateKey privateKey) {
			this.privateKey = privateKey;
		}
		public PublicKey getPublicKey() {
			return publicKey;
		}
		public void setPublicKey(PublicKey publicKey) {
			this.publicKey = publicKey;
		}
		public String getCertId() {
			return certId;
		}
		public void setCertId(String certId) {
			this.certId = certId;
		}
	}

	private static byte[] toByteArray(int i) {
		byte[] byteArray = new byte[4];
		byteArray[0] = (byte) (i >>> 24);
		byteArray[1] = (byte) ((i & 0xFFFFFF) >>> 16);
		byteArray[2] = (byte) ((i & 0xFFFF) >>> 8);
		byteArray[3] = (byte) (i & 0xFF);
		return byteArray;
	}

	/**
	 * 字节数组拼接
	 *
	 * @param params
	 * @return
	 */
	private static byte[] join(byte[]... params) {
		ByteArrayOutputStream baos = new ByteArrayOutputStream();
		byte[] res = null;
		try {
			for (int i = 0; i < params.length; i++) {
				baos.write(params[i]);
			}
			res = baos.toByteArray();
		} catch (IOException e) {
			e.printStackTrace();
		}
		return res;
	}

	/**
	 * 密钥派生函数
	 *
	 * @param Z
	 * @param klen
	 *            生成klen字节数长度的密钥
	 * @return
	 */
	private static byte[] KDF(byte[] Z, int klen) {
		int ct = 1;
		int end = (int) Math.ceil(klen * 1.0 / 32);
		ByteArrayOutputStream baos = new ByteArrayOutputStream();
		try {
			for (int i = 1; i < end; i++) {
				baos.write(GmUtil.sm3(join(Z, toByteArray(ct))));
				ct++;
			}
			byte[] last = GmUtil.sm3(join(Z, toByteArray(ct)));
			if (klen % 32 == 0) {
				baos.write(last);
			} else
				baos.write(last, 0, klen % 32);
			return baos.toByteArray();
		} catch (Exception e) {
			e.printStackTrace();
		}
		return null;
	}

//    public static byte[] sm4Decrypt(byte[] keyBytes, byte[] cipher, byte[] iv){
//    	return sm4Decrypt(keyBytes, cipher, iv, NO_PADDING);
//    }

	public static byte[] sm4DecryptCBC(byte[] keyBytes, byte[] cipher, byte[] iv, String algo){
		try {
			Key key = new SecretKeySpec(keyBytes, "SM4");
			Cipher in = Cipher.getInstance(algo, "BC");
			if(iv == null) iv = zeroIv(algo);
			in.init(Cipher.DECRYPT_MODE, key, getIV(iv));
			return in.doFinal(cipher);

		} catch (Exception e) {
//            throw new RuntimeException(e);
			return null;
		}
	}

	public static byte[] sm4EncryptCBC(byte[] keyBytes, byte[] data, byte[] iv, String algo){
		try {
			Key key = new SecretKeySpec(keyBytes, "SM4");
			Cipher in = Cipher.getInstance(algo, "BC"); //
			if(iv == null) iv = zeroIv(algo);
			in.init(Cipher.ENCRYPT_MODE, key, getIV(iv));
			return in.doFinal(data);
		} catch (Exception e) {
			throw new RuntimeException(e);
		}
	}

	public static final String SM4_ECB_NOPADDING = "SM4/ECB/NoPadding";
	public static final String SM4_CBC_NOPADDING = "SM4/CBC/NoPadding";
	public static final String SM4_CBC_PKCS7PADDING = "SM4/CBC/PKCS7Padding";
	public static final String SM4_ECB_PKCS5PADDING = "SM4/ECB/PKCS5Padding";

	/**
	 * cfca官网CSP沙箱导出的sm2文件
	 * @param pem 二进制原文
	 * @param pwd 密码
	 * @return
	 */
	public static Sm2Cert readSm2File(byte[] pem, String pwd){

		Sm2Cert sm2Cert = new Sm2Cert();
		try {
			ASN1Sequence asn1Sequence = (ASN1Sequence) ASN1Primitive.fromByteArray(pem);
//	    	ASN1Integer asn1Integer = (ASN1Integer) asn1Sequence.getObjectAt(0); //version=1
			ASN1Sequence priSeq = (ASN1Sequence) asn1Sequence.getObjectAt(1);//private key
			ASN1Sequence pubSeq = (ASN1Sequence) asn1Sequence.getObjectAt(2);//public key and x509 cert

//	    	ASN1ObjectIdentifier sm2DataOid = (ASN1ObjectIdentifier) priSeq.getObjectAt(0);
//	    	ASN1ObjectIdentifier sm4AlgOid = (ASN1ObjectIdentifier) priSeq.getObjectAt(1);
			ASN1OctetString priKeyAsn1 = (ASN1OctetString) priSeq.getObjectAt(2);
			byte[] key = KDF(pwd.getBytes(), 32);
			byte[] priKeyD = sm4DecryptCBC(Arrays.copyOfRange(key, 16, 32),
					priKeyAsn1.getOctets(),
					Arrays.copyOfRange(key, 0, 16), SM4_CBC_PKCS7PADDING);
			sm2Cert.privateKey = getPrivatekeyFromD(new BigInteger(1, priKeyD));
//	    	System.out.println(Hex.toHexString(priKeyD));

//	    	ASN1ObjectIdentifier sm2DataOidPub = (ASN1ObjectIdentifier) pubSeq.getObjectAt(0);
			ASN1OctetString pubKeyX509 = (ASN1OctetString) pubSeq.getObjectAt(1);
			CertificateFactory cf = CertificateFactory.getInstance("X.509", "BC");
			X509Certificate x509 = (X509Certificate) cf.generateCertificate(new ByteArrayInputStream(pubKeyX509.getOctets()));
			System.out.println(Base64.encodeBase64String(x509.getEncoded()));
			sm2Cert.publicKey = x509.getPublicKey();
			sm2Cert.certId = x509.getSerialNumber().toString();
			return sm2Cert;
		} catch (Exception e) {
			throw new RuntimeException(e);
		}
	}

	/**
	 *
	 * @param cert
	 * @return
	 */
	public static Sm2Cert readSm2X509Cert(byte[] cert){
		Sm2Cert sm2Cert = new Sm2Cert();
		try {
			CertificateFactory cf = CertificateFactory.getInstance("X.509", "BC");
			X509Certificate x509 = (X509Certificate) cf.generateCertificate(new ByteArrayInputStream(cert));
			sm2Cert.publicKey = x509.getPublicKey();
			sm2Cert.certId = x509.getSerialNumber().toString();
			return sm2Cert;
		} catch (Exception e) {
			throw new RuntimeException(e);
		}
	}

	public static IvParameterSpec getIV(byte[] iv){
		return new IvParameterSpec(iv);
	}

	public static byte[] zeroIv(final String algo) {

		try {
			Cipher cipher = Cipher.getInstance(algo);
			int blockSize = cipher.getBlockSize();
			byte[] iv = new byte[blockSize];
			Arrays.fill(iv, (byte)0);
			return iv;
		} catch (Exception e) {
			throw new RuntimeException(e);
		}
	}

	/**
	 * 后补0到位数为unitLength的整数倍
	 * @param value
	 * @return
	 */
	public static byte[] rightPadZero(byte[] value, final int unitLength){
		if (value.length % unitLength == 0)
			return value;
		int len = (value.length/unitLength + 1) * unitLength;
		return Arrays.copyOf(value, len);
	}

	public static byte[] generateCsr(PrivateKey privateKey, PublicKey publicKey){
		try{
			X500NameBuilder localX500NameBuilder = new X500NameBuilder(BCStyle.INSTANCE);
			localX500NameBuilder.addRDN(BCStyle.CN, "test");
			localX500NameBuilder.addRDN(BCStyle.C, "test");
			localX500NameBuilder.addRDN(BCStyle.O, "test");
			localX500NameBuilder.addRDN(BCStyle.OU, "test");
			localX500NameBuilder.addRDN(BCStyle.OU, "test");
			X500Name localX500Name = localX500NameBuilder.build();
			JcaPKCS10CertificationRequestBuilder p10Builder = new JcaPKCS10CertificationRequestBuilder(localX500Name, publicKey);
			JcaContentSignerBuilder csBuilder = new JcaContentSignerBuilder("SM3WITHSM2");
			ContentSigner signer = csBuilder.build(privateKey);
			PKCS10CertificationRequest csr = p10Builder.build(signer);
			return csr.getEncoded();
		} catch (Exception e) {
			throw new RuntimeException(e);
		}
	}

//	public static void main(String[] args) throws IOException, NoSuchAlgorithmException, NoSuchProviderException, InvalidAlgorithmParameterException, CertPathBuilderException, InvalidKeyException, SignatureException, CertificateException {
//
////        // 随便看看 ---------------------
////        System.out.println("GMNamedCurves: ");
////        for(Enumeration e = GMNamedCurves.getNames(); e.hasMoreElements();) {
////            System.out.println(e.nextElement());
////        }
////        System.out.println("sm2p256v1 n:"+x9ECParameters.getN());
////        System.out.println("sm2p256v1 nHex:"+Hex.toHexString(x9ECParameters.getN().toByteArray()));
//
//
//		// 生成公私钥对 ---------------------
//		KeyPair kp = generateKeyPair();
//
//		System.out.println(Hex.toHexString(kp.getPrivate().getEncoded()));
//		System.out.println(Hex.toHexString(kp.getPublic().getEncoded()));
//
//		System.out.println(kp.getPrivate().getAlgorithm());
//		System.out.println(kp.getPublic().getAlgorithm());
//
//		System.out.println(kp.getPrivate().getFormat());
//		System.out.println(kp.getPublic().getFormat());
//
//		System.out.println("private key d: " + ((BCECPrivateKey)kp.getPrivate()).getD());
//		System.out.println("public key q:" + ((BCECPublicKey)kp.getPublic()).getQ()); //{x, y, zs...}
//
//		byte[] msg = "message digest".getBytes();
//		byte[] userId = "userId".getBytes();
//		byte[] sig = signSm3WithSm2(msg, userId, kp.getPrivate());
//		System.out.println(Hex.toHexString(sig));
//		System.out.println(verifySm3WithSm2(msg, userId, sig, kp.getPublic()));
//
//		System.out.println(
//				"csr:\r\n-----BEGIN CERTIFICATE REQUEST-----\r\n" +
//						new String(Base64.encodeBase64Chunked(generateCsr(kp.getPrivate(), kp.getPublic())), "ascii") +
//						"\r\n-----END CERTIFICATE REQUEST-----");
//
////        // 由d生成私钥 ---------------------
////        BigInteger d = new BigInteger("097b5230ef27c7df0fa768289d13ad4e8a96266f0fcb8de40d5942af4293a54a", 16);
////        BCECPrivateKey bcecPrivateKey = getPrivatekeyFromD(d);
//		System.out.println(bcecPrivateKey.getParameters());
//		System.out.println(Hex.toHexString(bcecPrivateKey.getEncoded()));
//		System.out.println(bcecPrivateKey.getAlgorithm());
//		System.out.println(bcecPrivateKey.getFormat());
//		System.out.println(bcecPrivateKey.getD());
//		System.out.println(bcecPrivateKey instanceof java.security.interfaces.ECPrivateKey);
//		System.out.println(bcecPrivateKey instanceof ECPrivateKey);
//		System.out.println(bcecPrivateKey.getParameters());
//
//
//		公钥X坐标PublicKeyXHex: 59cf9940ea0809a97b1cbffbb3e9d96d0fe842c1335418280bfc51dd4e08a5d4
//		公钥Y坐标PublicKeyYHex: 9a7f77c578644050e09a9adc4245d1e6eba97554bc8ffd4fe15a78f37f891ff8
////        PublicKey publicKey = getPublickeyFromX509File(new File("/Users/xxx/xxx/certs/xxx.cer"));
////        System.out.println(publicKey);
//		PublicKey publicKey1 = getPublickeyFromXY(new BigInteger("59cf9940ea0809a97b1cbffbb3e9d96d0fe842c1335418280bfc51dd4e08a5d4", 16), new BigInteger("9a7f77c578644050e09a9adc4245d1e6eba97554bc8ffd4fe15a78f37f891ff8", 16));
//		System.out.println(publicKey1);
//		System.out.println(publicKey.equals(publicKey1));
//		System.out.println(publicKey.getEncoded().equals(publicKey1.getEncoded()));
//
////        byte[] x509bs = Base64.decodeBase64("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");
////        ByteArrayInputStream bais = new ByteArrayInputStream(x509bs);
////        PublicKey publicKey = getPublickeyFromX509File(bais);
////        System.out.println(publicKey);
//
////        // sm2 encrypt and decrypt test ---------------------
////        KeyPair kp = generateKeyPair();
////        PublicKey publicKey2 = kp.getPublic();
////        PrivateKey privateKey2 = kp.getPrivate();
////        byte[]bs = sm2Encrypt("s".getBytes(), publicKey2);
////        System.out.println(Hex.toHexString(bs));
////        bs = sm2Decrypt(bs, privateKey2);
////        System.out.println(new String(bs));
//
//
//
////        // sm4 encrypt and decrypt test ---------------------
////        //0123456789abcdeffedcba9876543210 + 0123456789abcdeffedcba9876543210 -> 681edf34d206965e86b3e94f536e4246
////        byte[] plain = Hex.decode("0123456789abcdeffedcba98765432100123456789abcdeffedcba98765432100123456789abcdeffedcba9876543210");
////        byte[] key = Hex.decode("0123456789abcdeffedcba9876543210");
////        byte[] cipher = Hex.decode("595298c7c6fd271f0402f804c33d3f66");
////        byte[] bs = sm4Encrypt(key, plain);
////        System.out.println(Hex.toHexString(bs));;
////        bs = sm4Decrypt(key, bs);
////        System.out.println(Hex.toHexString(bs));
//
//		String sm2 = "MIIDHQIBATBHBgoqgRzPVQYBBAIBBgcqgRzPVQFoBDDW5/I9kZhObxXE9Vh1CzHdZhIhxn+3byBU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\nVfY6";
//		byte[] bs = Base64.decodeBase64(sm2);
//		String pwd = "cfca1234";
//		GmUtil.Sm2Cert sm2Cert = GmUtil.readSm2File(bs, pwd);
//		System.out.println(sm2Cert.getPublicKey());
//		System.out.println(Hex.toHexString(((BCECPrivateKey)sm2Cert.getPrivateKey()).getD().toByteArray()));
//		System.out.println(sm2Cert.getPrivateKey());
//		System.out.println(sm2Cert.getCertId());
//
//		byte[] x509bs = Base64.decodeBase64("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");
//		GmUtil.Sm2Cert pub = readSm2X509Cert(x509bs);
//		System.out.println(pub.getPublicKey());
//		System.out.println(pub.getCertId());
//
//	}


}